GROWTH 



177 



More detailed are the data of an experiment under 

 plant conditions by Claassen (1927) with 77,000 kg. of 

 wort which consisted of molasses, malt sprout extract 



Table 39. — Balance Sheet of Yeast Growth 



C02 



kg. 



Composition at start 



and acid phosphate. To this, after filtration and sterili- 

 zation, the seed yeast was added with some wort. The 

 balance sheet of Table 39 shows the composition of these 

 materials. The air forced through the medium totaled 

 44,800 cubic meters, or six hundred times the volume 

 of the^medium, = 12,800 kg. oxygen, for the entire time 

 of growth. 



